CN104755719A - In-cylinder charging system for fuel delivery systems and methods - Google Patents
In-cylinder charging system for fuel delivery systems and methods Download PDFInfo
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- CN104755719A CN104755719A CN201380055912.2A CN201380055912A CN104755719A CN 104755719 A CN104755719 A CN 104755719A CN 201380055912 A CN201380055912 A CN 201380055912A CN 104755719 A CN104755719 A CN 104755719A
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- gas charging
- charging system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type
- F02M67/02—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type the gas being compressed air, e.g. compressed in pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
- F02B33/06—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M49/00—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston
- F02M49/02—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston using the cylinder pressure, e.g. compression end pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type
- F02M67/02—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type the gas being compressed air, e.g. compressed in pumps
- F02M67/04—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type the gas being compressed air, e.g. compressed in pumps the air being extracted from working cylinders of the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/001—Arrangements thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N2019/002—Aiding engine start by acting on fuel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
An air charging system includes a valve providing access to an engine cylinder, an accumulator coupled in flow communication with the valve, and a controller operable to open and close the valve until a threshold pressure condition is reached in the accumulator. Compressed gases stored in the accumulator are used in a fuel delivery system to prepare a charge of fuel that is delivered to an engine.
Description
Technical field
The disclosure relates to fuel system, and relates more specifically to as utilizing multiple fluid to provide pressurized gas by fuel area density to the fuel delivery system of motor.
Background technique
For many years, in order to liquid rotating being become the aerosol or fine grain object that are easily transformed into gas phase, develop eurypalynous device perhaps.Many such devices are developed, such as, in order to prepare the fuel being used for using in internal-combustion engine.In order to optimize the oxidized of engine combustion indoor, fuel must be vaporized, (such as, the air) homogenization that utilizes oxygenant and being in stoichiometric gas phase mixture.Desirable fuel atomization and vaporization can realize burning more completely and decrease motor and export pollution.Under water or High aititude power operation when, oxygenant more effectively can become one other fluid (gas or liquid).In special service application, the combustion efficiency based on oxygenant chooses oxygenant, and does not consider cost.The another kind of factor that oxygenant is selected is the quality of every oxidation unit (such as, hydrogen peroxide etc.).
More specifically, about internal-combustion engine, stoichiometry is so a kind of situation, in this condition, with the amount of oxygen needed for the fuel of homogeneous mixture supply perfect combustion specified rate, thus cause best correct burning, and not due to the remaining residue from incomplete or inefficient oxidation.Ideally, fuel should vaporize completely, mutually mix with air and before ignition homogenization to be correctly oxidized.The fuel droplet of not vaporizing is not lighted or partial combustion in general internal combustion engine and external-combustion engine, it reduces fuel efficiency and add motor to export pollution.
To reduce or the trial of control discharge by product affects NO usually by regulating temperature and pressure
xby product.In order to meet emission standard, these residues must be processed, after typically needing to process in catalytic converter or washing machine.This process of these residues causes the fuel cost added, and to operate catalytic converter or washing machine, and may need the component costs of adding and involved encapsulation and quality requirement.Accordingly, any minimizing that the motor caused by partial combustion exports residue will have economy and environment interests.
In addition to the preceding, the fuel of not vaporizing completely in stoichiometric air/fuel mixture causes combustion engine to run lower than peak efficiencies.When fuel does not fully burn, the smaller portions of the chemical energy of fuel change into mechanical energy.Waste fuel energy, and create unnecessary pollution.Therefore, by dividing further and vaporized fuel-air mixture more completely, better fuel efficiency can be obtained.
Many trials are made to alleviate the above-mentioned problem about carburretion and incomplete fuel combustion.Such as, in motor car engine, in order to fuel area density, entry port or direct fuel spray and almost replace carburetion at large.In the entry port that fuel is directly ejected into motor by fuel injector or cylinder, and be by electronically controlled.Relative to carburetion, sparger is conducive to measuring more accurately the fuel quantity being transported to each cylinder and controlling independently.This reduce or eliminates charging time of delivery, thus promotes best transient operation.But the size of fuel droplets of fuel injector spraying is not best, and it is little to leave the time that fuel and air carry out mixing before ignition for.
The fuel delivery system of some types needs source of compressed air, correctly fuel area density is used for burning to cylinder.Pressurized air is typically by motor, provided by the non-vehicle mounted electrical apparatus device (electrically off-board) of the compressor part of power operation or motor.Before operating at compressor during ato unit, exist and the challenge providing source of compressed air relevant for fuel delivery system.
Summary of the invention
Principle described herein can address the aforementioned drawbacks and some in other defect.Provide a kind of gas charging system on the one hand, this gas charging system comprise the path being provided to cylinder valve, be connected into the reservoir and controller that are communicated with described valve fluid, described controller can operate into the described valve of opening and closing, until reach threshold pressure condition in described reservoir.
Described valve can comprise poppet valve.Described poppet valve may be biased to closed position.During the compression cycle that described motor starts when starting, described controller can open described valve.The pressurized air that described controller can work to control to store in described reservoir is to the flowing in fuel delivery system.Described reservoir can comprise holding vessel.Described reservoir can keep a certain amount of pressurized air being enough to be used at least one engine ignition sequence.Described valve can comprise the lifting valve opening that being arranged in described cylinder is outwards opened.Described gas charging system can comprise solenoid, and this solenoid is constructed to described valve is moved between open and closed positions.
Another aspect of the present disclosure relates to one from cylinder, gets rid of compressed-air actuated method.Described method comprises provides valve and reservoir, and wherein, this valve is provided to the path of described cylinder, and this reservoir is connected into and is communicated with described valve fluid.Described method also comprises: during engine compression strokes, open described valve; While described valve is opened, the pressurized air from described cylinder is collected in described reservoir; And, by described compressed-air-storing in described reservoir, to be used in fuel delivery system.
Described method can also comprise: when reaching predetermined pressure condition in described reservoir, close described valve.Described method can comprise: when described engine compression strokes completes, close described valve.Described valve can comprise: directly to the valve opening in described cylinder; Be positioned at the valve seat of described cylinder; And can be moved into and to contact with described valve base sealing and to depart from the poppet valve sealing and contact.Described method can comprise described valve is biased into closed position.
The method of ato unit is related to according to other method of the present disclosure.Described method comprises: provide gas charging system and fuel delivery system, and wherein said gas charging system comprises valve and reservoir, and this valve is constructed to the ram leading to described motor, and this reservoir is connected to and is communicated with described valve and described fuel delivery system fluid.Described method comprises: during the compression cycle of described motor, open described valve; Pressurized air from cylinder is collected in described reservoir; Described pressurized air is transported to described fuel delivery system from described reservoir; And, fuel is transported to cylinder from described fuel delivery system with ato unit.
Described method can comprise: after the compression cycle completing described motor, closes described valve.Described method can comprise: reach predetermined pressure condition in described reservoir after, closes described valve.Described method can comprise: after only reaching predetermined pressure condition in described reservoir just by described compressed air delivery to described fuel delivery system.Described method can comprise: after described engine start, cuts off the pressurized air from described reservoir to described fuel delivery system.Described method may further include: utilize multiple compression cycle of described motor to reach the predetermined pressure condition in described reservoir.Described method can also comprise: provide solenoid, to operate described valve between open and closed positions based on the pressure condition in the compression cycle of described cylinder and described reservoir.
Accompanying drawing explanation
Accompanying drawing illustrates some embodiment discussed below, and is a part for specification.
Fig. 1 illustrates the schematic diagram according to an exemplary gas charging system of the present disclosure.
Fig. 2 illustrates the schematic diagram according to another exemplary gas charging system of the present disclosure.
Fig. 3 illustrates the schematic diagram according to another exemplary gas charging system of the present disclosure.
Fig. 4 A and 4B is the perspective view according to a kind of exemplary gas charging system vehicle assembly of the present disclosure.
Fig. 5 A and 5B is according to the cross-sectional view being arranged in the exemplary valve assemblies of closed position and open position of the present disclosure.
Fig. 6 shows the flow chart according to a kind of exemplary operation strategy of the present disclosure.
Fig. 7 shows the flow chart according to another exemplary operation strategy of the present disclosure.
In all of the figs, identical reference character represents similar but need not be identical element with describing.
Embodiment
Exemplary embodiment and aspect are described below.Certainly, will understand, and in the exploitation of any this practical embodiments, a lot of mode of execution must be made and specifically determine, and to realize the specific objective of developer, such as defer to and to be correlated with changing to the another kind of system implemented from a kind of enforcement the constraint relevant with business.And will understand, this development efforts may be complicated and consuming time, but will be only the routine that the those skilled in the art with disclosure benefit bear.
The disclosure relates to fuel-preparation system and method, and produces related system and the method for the pressurized air being used for this fuel-preparation system.The fuel-preparation system of one type has two-fluid input, and wherein one of fluid is gas (such as, air), and one other fluid is liquid (such as, liquid fuel such as gasoline).Need supply gas to start the operation of fuel-preparation system, thus ready fuel charge is transported to motor for ato unit.Once motor run, then machinery or electronically drive compressor can bear the task of compressed gas source being provided to fuel-preparation system.Before ato unit, utilize and such as inflate the supply that reservoir tank, transducer, reformer or other inflation feeding mechanism can provide pressurized gas.
When engine start is to start, during the compression stroke rotated in initial engine according to a kind of exemplary gas charging system of the present disclosure, collect the pressurized air of the cylinder from described motor.Described pressurized air is stored in reservoir, to provide enough for operating the air volume of described fuel-preparation system with ato unit.At least one compression cycle can be needed, to feed to described gas charging system fully, thus provide suitable air volume to carry out ato unit.Air pressure in described reservoir can be monitored between motor breaking-in period, to determine when to start ignition order (such as, from the fuel area density of fuel-preparation system).Once motor starts igniting, compressor that is engine-driven or disengaging motor can bear responsibility pressurized air being provided to fuel-preparation system.In an example, therefore parasitic loss can be reduced with lower amount at instant engine demand place application variable displacement Ya Suo Ji –.
Exemplary gas charging system disclosed herein can operate, to remove the gas (such as, air) of the ram from motor between motor breaking-in period.The pressurized air be eliminated can use, with ato unit together with fuel-preparation system such as two-fluid jet system.In U.S. Patent Publication No.2011/0284652, disclose a kind of exemplary two-fluid jet system and correlation technique, its full content is incorporated herein by reference.
Gas charging valve assembly, reservoir, control valve and controller (such as, control unit of engine (ECU)) is comprised according to a kind of exemplary gas charging system of the present disclosure.Described gas charging valve assembly can comprise valve member (such as, poppet valve), and this valve member is provided to the path in the ram firing chamber of motor.During the compression cycle of motor, take out pressurized air by gas charging valve assembly from described engine power cylinder.Described pressurized air is stored in described reservoir.Described gas charging valve assembly operates between open and closed positions, to collect the pressurized air (typically during compression stroke) from engine power cylinder.The air from ram compression stroke can be collected in several cycles, until reach threshold pressure in described reservoir.Described controller starts engine start sequence subsequently, wherein, pressurized air from described reservoir is transported to air metering device, and pressurized air is supplied to fuel delivery means by described air metering device, described fuel delivery means by fuel area density to motor.Once motor is activated, control valve is just switched to compressor from described reservoir, and described compressor operates, for pressurized air is supplied to described air metering device with machinery or electronics mode under the power of motor.
Referring now to Fig. 1, show a kind of schematic diagram of exemplary gas charging system 10, this gas charging system 10 comprises gas charging valve assembly 12, reservoir 14, control valve 16, compressor 18, one-way valve 20, controller 22 and air metering device 24.Gas charging valve assembly 12 provides the air-flow from cylinder 30.The gas utilizing gas charging valve assembly 12 to enter travels through one-way valve 20 to control valve 16.Control valve 16 controls the flowing of gas to reservoir 14.Reservoir 14 is coupled to air metering device 24.Air metering device 24 controls the flow rate and the pressure that are transported to the air of fuel delivery means 26.Air metering device 24 can comprise modulating valve (such as, preset valve or vario valve).Modulating valve can be variable, via such as control unit of engine (ECU) based on systematic parameter or operation cycle/needs and changing.Fuel delivery means 26 utilizes the pressurized air from air metering device 24 produce fuel charge and fuel charge is transported to motor 28.Control valve 16 can flow to the position of air metering device 24 and air at gas from gas charging valve assembly 12 and flow between the position of air metering device 24 from compressor 18 and operate.
Controller 22 can control the operation of multiple parts of gas charging system 10.Such as, controller 22 can receive the sensor signal relevant with the piston position in cylinder 30 from motor 28, to help to determine when that gas charging valve assembly 12 should be operated between open and closed positions.From air system (such as, from the sensor 329 in the other parts of air supply rail (air supply rail), manifold or the system as shown in Fig. 4 A, this sensor directly transmits air system information) with the sensor signal relevant by operating position of the pressure condition in such as reservoir 14 and control valve 16, also can by controller 22 with helping determine such as when carry out retrofire circulation by pressurized air is transported to fuel delivery means 26 from air metering device 24.Typically, control valve 16 operates, only to have started and compressor 18 provides the connection between reservoir 14 and compressor 18 to flow after carrying out operating to produce pressurized air at motor 28.
Illustrate with reference to Fig. 5 A and 5B and describe in detail a kind of exemplary gas charging valve assembly 12 further.Gas charging valve assembly 12 comprises valve element 40, valve seat 42, valve opening 44, solenoid 46 and biasing element 48.Valve element 40 comprises bar 50 and head 52.When gas charging valve assembly 12 is in the closed position as shown in Fig. 5 A, head 52 abuts against valve seat 42 and seals.Operating this solenoid 46 can make head 52 move away valve seat 42, flows through valve opening 44 as shown in Fig. 5 B to allow gas (such as, air).Head 52 is biased in the closed position of Fig. 5 A by biasing element 48.
Gas charging valve assembly 12 shown in Fig. 5 A and 5B is typically called as poppet valve or poppet valve assembly.The valve of other type can be used for replacing poppet valve, such as such as rotary valve.Poppet valve typically provide weight demands minimum, in the intersection sealing reliably and entered the advantage of failure mode of closed position by the operation of biasing element 48 usually of head 52 and valve seat 42.In addition, poppet valve does not need the geometrical construction changing firing chamber.Poppet valve leads in firing chamber by the direction outwardly, thus allows to move, so that for gas charging system 10 around valve element 40 and by the maximum air flow of valve opening 44.In addition, when engine ignition and piston moves time, the top due to head 52 is forced to return in valve seat 42, and poppet valve can maintain sealing closely.
As noted above, sensor can be used for the position of the piston determining work in cylinder 30.Controller 22 operates gas charging valve assembly 12 between a closed position and a open position based on the position (such as, crank position) of the piston of work in cylinder 30.Can use multiple sensor, one of them sensor instruction crank position, and which circulation another sensor determination cylinder is in.Typically, gas charging valve assembly 12 is operated into open position during compression stroke, and is closed during the crank position kept.Gas charging valve assembly 12 can be opened and closed several times (such as, opening circulation), to obtain the air supply in the reservoir 14 of operation needed for fuel delivery means 26.
Reservoir 14 can have the shape of any expection, size and volume.Reservoir 14 can be mounted in the structure that the independence outside motor 28 is formed.In alternative constructions, reservoir 14 is integrated in motor 28, such as, be formed (such as, cast) in a part for cluster engine or motor head.Fig. 3 shows a kind of exemplary gas charging system 200, and this gas charging system 200 comprises the reservoir 14 be integrated in motor 28.In other is arranged, reservoir 14 is set to individual components.At least one sensor can be associated with reservoir 14, to determine the pressure condition in reservoir 14.Exemplary reservoir 14 can have the volume within the scope of about 1L to about 3L, more preferably, for the multicylinder engine of 4 cylinders, has the volume of about 2L.
Control valve 16 can (but being not limited to) be such as three-way valve or reciprocable valve.Control valve 16 operates between the first position and the second position, in primary importance, gas flow to reservoir 14, in the second place from gas charging valve assembly 12, stream from gas charging valve assembly 12 to reservoir 14 is closed, and the independent stream between compressor 18 and reservoir 14 is opened.Such as, based on the serviceability of the pressure condition sensed in reservoir 14, compressor 18 and the operational condition of motor 28, can operation control valve 16 between the first position and the second position.
Compressor 18 can be mechanically driver type or electronic compressor.Typically, after motor 28 has been activated, the compressor 18 of mechanically driver type has been exercisable, and compressor 18 is provided power by motor 28.Electronic compressor can operate by utilizing the electricity produced by motor 28, or can extract the electricity of the battery such as had nothing to do with power operation from different dynamic source.Utilize mechanically operated compressor 18 can provide low cost, low weight, simple option, thus for providing minimum requirements for the pressurized air of fuel delivery means 26.
One-way valve 20 is positioned in the flow circuits between gas charging valve assembly 12 and reservoir 14 or control valve 16.The pressurized air that one-way valve 20 contributes to preventing from collecting from gas charging valve assembly 12 flows backwards.
Controller 22 can be the constituent element of control unit of engine (ECU).Controller 22 can receive the input of the multiple sensors from air exchange system 10 and motor 28, and receives the feedback relating to the operation of the various parts of gas charging system 10, fuel delivery means 26 and motor 28.At minimum value place, controller 22 typically controls gas charging valve assembly 12 operation between open and closed positions, control control valve 16 operation between the first position and the second position, and control the compressed-air actuated conveying be stored in reservoir 14 or the compressed-air actuated conveying being transported to air metering device 24 from compressor 18.Controller 22 can provide other operation and relevant method for gas charging system 10.
Air metering device 24 can regulate and be stored in compressed-air actuated flow rate in reservoir 14 and pressure condition, and described pressurized air is transported to fuel delivery means 26.In an example, air metering device 24 provides pressure to be about 4Bar/58psi to about 6Bar/87psi and flow rate to be the air stream of about 2.2kg/hr to about 22kg/hr.
In the arrangement shown in figure 1, reservoir 14 can serve as the compressed-air actuated buffer for being transported to air metering device 24 from gas charging valve assembly 12 or compressor 18.In an example, the pressurized air supplied via gas charging valve assembly 12 can be transported to reservoir 14 in the short burst collected during the compression cycle of motor, until reach threshold pressure condition in reservoir 14.Compressor 18 can have pressurized air and export, and this output is modulated based on the operational condition of such as motor 28.Reservoir 14 can regulate or cushion the surge pressure and valley pressure carried from air pressure source (such as, cylinder 30 or compressor 18), thus makes the compressed-air actuated condition being transported to air metering device 24 be more consistent.
Referring now to Fig. 2, another kind of exemplary gas charging system 100 comprises to be arranged for the difference of reservoir 14 relative to control valve 16.Fig. 2 shows in the supply lines that reservoir 14 is between gas charging valve assembly 12 and control valve 16.Control valve 16 operates, to receive the air stream from reservoir 14 or compressor 18, and by compressed air delivery to air metering device 24.Control valve 16 is switching as between the reservoir 14 of source of compressed air and compressor 18.
As noted above, Fig. 3 shows a kind of gas charging system 200, and wherein, reservoir 14 is integrated into a part or parts of motor 28.In other layout, other part of gas charging system 200 or parts can be integrated in motor 28, or are mutually combined, to provide compacter, the more uncomplicated system such as with less parts.
Fig. 4 A and 4B shows another exemplary gas charging system 300, and this system is similar to the schematic gas charging system 10 described above with reference to Fig. 1 in some aspects.Gas charging system 300 comprises the first and second gas charging valve assembly 312A, 312B, reservoir 314, control valve 316, compressor 318, air metering device 324 (being also referred to as pressure regulator) and pressure transducer 334.Gas charging system 300 can be connected to first and second fuel delivery means 326A, the 326B being installed to motor 328.Compressor 318 can be mechanical, engine-driven compressor, and it carries out operating to provide pressurized air after motor 328 operates.Gas charging system 300 can comprise electronic compressor 332 further or alternatively, before motor starts as reservoir charging, or after motor is activated as a kind of alternative source of compressed air, if electronic compressor 332 can be used for compressor 318 or first and second gas charging valve assembly 312A, 312B correctly do not operate, then by utilizing the energy content of battery to produce pressurized air.
Reservoir 314 is positioned in the pipeline between control valve 316 and first and second fuel delivery means 326A, 326B.First and second gas charging valve assembly 312A, 312B are connected to and are communicated with control valve 316 fluid.
With reference to Fig. 6, show a kind of exemplary operation strategy or the method 400 of one of operation gas charging system 10,100,200 described herein.The initial step 402 of the method can comprise the initial pressure inspection in reservoir 14.If reservoir pressure is higher than threshold pressure level, then system can be automatically moved to the step 418 of ato unit by the pressurized air from reservoir is transported to fuel delivery means by air metering device.If the pressure condition of reservoir is lower than threshold level, then step 404 provides and reads engine position sensor to determine engine location and cycle of engine in a step 406.In a step 408, during the compression cycle of motor, gas charging valve is opened.In step 410, when valve is open, air is moved out of firing chamber and enters in reservoir.In step 412, the pressure condition in system monitoring reservoir.In step 414, when motor is not in burn cycle, close gas charging valve.When reaching the threshold pressure needed for ato unit (such as, operation fuel delivery means) in step 416 in reservoir, in step 418 by operation fuel delivery means ato unit.If do not reach threshold pressure in reservoir, then system turns back to step 406, again to open gas charging valve, collects in reservoir with the additional air of spontaneous combustion in future room.
The other step of method 400 can be included in operation control valve after motor starts to receive the pressurized air from compressor (such as, mechanical or electronic compressor), and this control valve utilizes the energy from motor and operated.The pressurized air provided by compressor can be used to operate fuel delivery means, to continue the operation of motor.
After motor is activated, gas charging system disclosed herein can be used as the standby system of compressor.Such as, in the operation period of motor, compressor may break down.The controller of gas charging system can differentiate that compressor breaks down (such as, the decline of the pressure of fuel delivery means is supplied to) via air metering device sensing, and switching control valve 16, so that the pressurized air received from gas charging valve assembly in order to the operation just carried out of motor.
In an example, reservoir 14 can be loaded the pressurized gas scale of construction exceeded for operating fuel delivery means 26 aequum (such as, stress level).After the start of engine and be complete operation at compressor 18 and produce enough pressurized air with before operating fuel delivery means 26, the additional gas be collected in reservoir 14 can be used for operating motor a period of time temporarily.The threshold pressure condition set for reservoir 14 before the startup circulation of engine on 28 can higher than the minimum flow of the air pressure needed for ato unit and/or initial manipulation fuel delivery means.
Referring now to Fig. 7, comprise the first operating procedure 502 providing valve and reservoir according to another exemplary operation strategy of the present disclosure or method 500, wherein, this valve is provided to the path of cylinder, and this reservoir is connected into and is communicated with described valve fluid.Step 504 opens this valve during being included in the compression stroke of motor.Step 506 comprises: while this valve is opened, collected in reservoir by the pressurized air from cylinder.In step 508, this pressurized air is stored in reservoir so that after a while for fuel delivery system, with by fuel area density in motor.
Method 500 can also be included in and switch as between the reservoir of source of compressed air and compressor (such as mechanical commprssor), and this compressor is powered by motor after the engine started.Alternatively, reservoir is used to the pressurized air collected by operating position from cylinder or compressor depending on control valve.Before the engine is started and afterwards, when fluctuation occurs the contracting air quantity provided by cylinder or compressor, reservoir can serve as buffer.
The gas charging valve in cylinder and reservoir can be used, to be provided " regenerative braking " energy by the air of engine compresses by storing during braking.The pressure be accumulated between compression period in reservoir provides engine braking, therefore more effective car brakeing.The gas (such as, air) be stored is sent to pneumatic motor or other air-operated driveline components subsequently, to provide vehicle startup or torque assist during higher torque request pattern, because this reducing fuel consumption.
Relating to according to another illustrative methods of the present disclosure utilizes gas charging system to improve motor.Described method can be included in the interior formation of the housing being formed with cylinder (such as, holing) valve opening and valve seat.Valve element is installed to motor, and can operate in valve opening, flow to reservoir 14 to control gas from cylinder 30.Reservoir 14 is connected into and is communicated with air metering device 24 fluid, and air metering device 24 is connected into and is communicated with fuel delivery means 26 fluid.Compressor 18 also can be connected into and be communicated with air metering device 24 fluid.Control valve can be positioned in the flow circuits between gas charging valve and reservoir or between reservoir and air metering device, describes above with reference to Fig. 1 and 2.
Being be convenient to engine start with an advantage by utilizing gas charging system disclosed herein to be associated, during engine start, utilizing motor as air pump, thus eliminate during engine start the demand of air-source independently providing power.
Another potential advantage be alleviate with attempt storing compressed air for during engine start by the risk be associated that fuel delivery means uses.The consumption being stored air may be produced by the leakage in the permeability of storage device or system, when the engine is not running described leakage may occur.The consumption of the air charge be stored will suppress the operation of dual fluid fuel feedway in addition.Gas charging system disclosed herein can pass through between the starting period or just collects a certain amount of pressurized air when the engine is started before being initiated and avoid the compressed-air actuated dependence to being stored.
Another potential advantage relates to and eliminating before ato unit the demand being reservoir charging or the motor-drive pump in addition pressurized air being supplied to fuel delivery means.Avoid using electric pump to preserve capacity of battery, described battery capacity may need the operation such as delivering the vehicle component of motor for motor and other parts in addition.
Another advantage can relate to the mode of execution of the compressor pump that mechanical engine drives, to provide source of compressed air after motor is started.Can the limited place of power load, mechanical compress pump be used to have superiority.
More other potential advantage relates to the additional functional provided by gas charging system, has quite few or that do not have increase reciprocating mass, parasitic load or inertia.
Two fluid system may be desirable for the situation being adopted as special duty and customized multiple oxygenant and mixture.
Be provided front description only for illustrate and principle claimed below describing some in, embodiment and example.It is not intended to is exhaustive or described principle is restricted to disclosed any precise forms.In view of above-mentioned open, many modification and variant are possible.This modification is that the present inventor expects and in right.The scope of described principle is defined by the following claims.
Claims (21)
1. a gas charging system, comprising:
Valve, described valve is provided to the path of cylinder;
Reservoir, described reservoir is connected into and is communicated with described valve fluid;
Controller, described controller can operate into the described valve of opening and closing, until reach threshold pressure condition in described reservoir.
2. gas charging system according to claim 1, wherein, described valve comprises poppet valve.
3. gas charging system according to claim 2, wherein, described poppet valve is biased into closed position.
4. gas charging system according to claim 1, wherein, during the compression cycle that motor starts when starting, valve described in described controller opens.
5. gas charging system according to claim 1, wherein, described controller work with the pressurized air controlling to store in described reservoir to the flowing in fuel delivery system.
6. gas charging system according to claim 1, wherein, described reservoir comprises cylindricality holding vessel.
7. gas charging system according to claim 5, wherein, described reservoir keeps a certain amount of pressurized air being enough to be used at least one engine ignition sequence.
8. gas charging system according to claim 2, wherein, described valve comprises the lifting valve opening that being arranged in described cylinder is outwards opened.
9. gas charging system according to claim 1, also comprises solenoid, and described solenoid is constructed such that described valve moves between the open and closed positions.
10. from cylinder, get rid of a compressed-air actuated method, comprising:
There is provided valve and reservoir, described valve is provided to the path of cylinder, and described reservoir is connected into and is communicated with described valve fluid;
Described valve is opened during engine compression strokes;
While described valve is opened, the pressurized air from described cylinder is collected in described reservoir;
By described compressed-air-storing in described reservoir, to be used in fuel delivery system.
11. methods according to claim 10, also comprise: when reaching predetermined pressure condition in described reservoir, close described valve.
12. methods according to claim 10, also comprise: when described engine compression strokes completes, close described valve.
13. methods according to claim 10, wherein, described valve comprises: directly to the valve opening in described cylinder; Be positioned at the valve seat of described cylinder; And can be moved into and to contact with described valve base sealing and to depart from the poppet valve sealing and contact.
14. methods according to claim 10, also comprise and described valve are biased into closed position.
The method of 15. 1 kinds of ato units, comprising:
There is provided gas charging system and fuel delivery system, described gas charging system comprises valve and reservoir, and described valve is constructed to the ram leading to described motor, and described reservoir is connected to and is communicated with described valve and described fuel delivery system fluid;
Described valve is opened during the compression cycle of described motor;
Pressurized air from described cylinder is collected in described reservoir;
Described pressurized air is transported to described fuel delivery system from described reservoir;
Fuel is transported to described cylinder from described fuel delivery system, to start described motor.
16. methods according to claim 15, also comprise: after the compression cycle completing described motor, close described valve.
17. methods according to claim 15, also comprise: reach predetermined pressure condition in described reservoir after, close described valve.
18. methods according to claim 15, also comprise: after only reaching predetermined pressure condition in described reservoir just by described compressed air delivery to described fuel delivery system.
19. methods according to claim 15, also comprise: after described engine start, cut off the pressurized air from described reservoir to described fuel delivery system.
20. methods according to claim 17, also comprise: utilize multiple compression cycle of motor to reach the described predetermined pressure condition in described reservoir.
21. methods according to claim 15, also comprise: provide solenoid, to operate described valve between open and closed positions based on the pressure condition in the compression cycle of described cylinder and described reservoir.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/626,716 | 2012-09-25 | ||
| US13/626,716 US9032938B2 (en) | 2012-09-25 | 2012-09-25 | In-cylinder charging system for fuel delivery systems and methods |
| PCT/US2013/058701 WO2014051974A1 (en) | 2012-09-25 | 2013-09-09 | In-cylinder charging system for fuel delivery systems and methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104755719A true CN104755719A (en) | 2015-07-01 |
Family
ID=50337628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380055912.2A Pending CN104755719A (en) | 2012-09-25 | 2013-09-09 | In-cylinder charging system for fuel delivery systems and methods |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US9032938B2 (en) |
| EP (1) | EP2900954A4 (en) |
| JP (1) | JP6301338B2 (en) |
| KR (1) | KR20150086241A (en) |
| CN (1) | CN104755719A (en) |
| IN (1) | IN2015DN02887A (en) |
| MX (1) | MX2015003798A (en) |
| WO (1) | WO2014051974A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116505033A (en) * | 2023-06-28 | 2023-07-28 | 佛山市清极能源科技有限公司 | Fuel cell air system leakage diagnosis method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9206737B2 (en) * | 2013-04-05 | 2015-12-08 | Enginetics, Llc | System control strategy and methods for multi-physics fuel atomizer |
| EP3559427B1 (en) * | 2016-12-22 | 2021-03-10 | Volvo Truck Corporation | A gas feeding arrangement |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9032938B2 (en) | 2015-05-19 |
| KR20150086241A (en) | 2015-07-27 |
| US20140083395A1 (en) | 2014-03-27 |
| IN2015DN02887A (en) | 2015-09-11 |
| MX2015003798A (en) | 2016-02-05 |
| WO2014051974A1 (en) | 2014-04-03 |
| EP2900954A4 (en) | 2016-07-13 |
| US20150226164A1 (en) | 2015-08-13 |
| JP6301338B2 (en) | 2018-03-28 |
| EP2900954A1 (en) | 2015-08-05 |
| JP2015532961A (en) | 2015-11-16 |
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